Feature: 1. Function -- Equipped with enlarged encrypted heat dissipation holes, which can reduce heat and safe to use. 2. Ventilation design -- The ventilation design helps to keep the bike disc brake clean and there will be no dust on the bike disc brake. 3. Stable performance -- The bike disc brake used sophisticated production technology, and the bike disc brake has stable performance and high friction. 4. Easy to operate -- The bike disc brake is easy to install and disassemble, easy to operate, suitable for mountain bikes and folding bikes. 5. High quality -- The bike disc brake is made of high‑quality materials, this bike disc brake is sturdy, durability, not easily damaged, and has a long service life. Specification: Item Type: Bike Disc Brake Material: Alloy Steel Product Size: Diameter: Approx. 160mm / 6.3in Center of the Hole: Approx. 35mm / 1.4in (Manual Measurement Allows 1-2mm Error) Package List: 1 x Bike Disc Brake